Eye Floaters: What Causes Them & When Are They Serious?

Dec 1, 2025

eye floaters on a bright sky background

Have you ever noticed small, shadowy shapes drifting through your vision? These visual disturbances, called eye floaters, are often harmless but can sometimes indicate a more serious eye condition. 

In this blog, we explain why floaters appear and when you should schedule a comprehensive eye exam

What are eye floaters? 

Eye floaters appear as black or gray specks, threads, or cobweb-like shapes that move across your visual field.¹ They are caused by tiny clumps of collagen or cells within the vitreous, the gel-like substance inside your eyes. As light passes through the vitreous, these clumps cast shadows on your retina, which your brain interprets as floating shapes. 

Floaters tend to drift as your eyes move, and they often appear more noticeable when looking at plain, bright backgrounds like a blue sky or a white wall. 

Common causes of eye floaters 

Floaters can develop for several reasons, often related to natural changes in the eye as you age: 

  • Vitreous shrinkage: The vitreous gel naturally becomes more liquid over time, which can create clumps or strands that appear as floaters. 
  • Posterior vitreous detachment (PVD): This occurs when the vitreous pulls away from the retina, often causing an increase in floaters. 
  • Eye injuries or surgery: Trauma or procedures like cataract surgery can sometimes lead to floaters. 
  • Inflammation or infection: Uveitis or other eye conditions can cause debris to appear in the vitreous. 

When floaters in the eye may be serious 

While most floaters are harmless, you should seek professional care if you notice¹: 

  • A sudden increase in floaters 
  • Flashes of light in your vision 
  • A dark shadow or curtain over part of your visual field 
  • Loss of peripheral vision 

These symptoms could indicate retinal tears or detachments, which are serious conditions that need immediate emergency eye care

How our eye doctors can help 

During a comprehensive eye exam, our eye doctors in Mt. Pleasant, Alma, Carson City, St. Louis, State Street, Calumet, and Oscoda can thoroughly examine your retina and vitreous to identify the cause of your floaters. Detecting issues early allows for timely care and can help prevent serious complications. 

Depending on the underlying cause, treatment may range from careful monitoring to procedures that repair retinal tears or detachments. In most cases, however, floaters can be safely managed without any invasive treatment. 

Lifestyle tips to reduce eye strain from floaters 

While floaters themselves are often unavoidable, reducing eye strain can help you notice them less: 

  • Take regular breaks from screens 
  • Maintain proper lighting when reading or working 
  • Wear sunglasses to reduce glare outdoors 
  • Keep up with routine comprehensive eye exams 

Protect your vision and peace of mind 

Floaters can be unsettling, but understanding their causes and knowing when to seek care can help you feel confident about your eye health. Schedule an appointment at an Optics Group clinic near you to ensure your eyes are healthy and your vision is protected. 

References: 

  1. Eye floaters. mayoclinic.org 
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